---
title: "CMIP6 HighResMIP daily climate projection"
method: GET
path: "/api/v1/weather/climate"
tags: ["Environment"]
---

# CMIP6 HighResMIP daily climate projection

`GET /api/v1/weather/climate`

Daily climate projection series from CMIP6 HighResMIP (seven high-resolution models: CMCC_CM2_VHR4, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, EC_Earth3P_HR, MPI_ESM1_2_XR, NICAM16_8S) served by Open-Meteo. Temporal range 1950-01-01 through 2050-12-31. Each (date, model) combination returns the requested daily variables (temperature, precipitation, wind, humidity, radiation, soil moisture). Per-model nulls are preserved. Data by Open-Meteo.com, CC BY 4.0.

## Query parameters

- `latitude` number, required — Latitude in decimal degrees (-90 to 90).
- `longitude` number, required — Longitude in decimal degrees (-180 to 180).
- `start_date` string, required — Start date, YYYY-MM-DD (>= 1950-01-01).
- `end_date` string, required — End date, YYYY-MM-DD (<= 2050-12-31).
- `models` string — Comma-separated list of CMIP6 HighResMIP models. Allowed: CMCC_CM2_VHR4, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, EC_Earth3P_HR, MPI_ESM1_2_XR, NICAM16_8S.
- `daily` string — Comma-separated list of daily variables. Allowed values include temperature_2m_max/min/mean, precipitation_sum, rain_sum, snowfall_sum, wind_speed_10m_max, shortwave_radiation_sum, relative_humidity_2m_{max,min,mean}, dew_point_2m_{max,min,mean}, cloud_cover_mean, pressure_msl_mean, et0_fao_evapotranspiration, soil_moisture_0_to_10cm_mean.

## Response `200`

Daily climate projection rows pivoted by model.

- EnvelopeOpenMeteoClimateProjectionData
  - `data` OpenMeteoClimateProjectionData, required — CMIP6 HighResMIP daily projection series, pivoted by model.
    - `latitude` number, required — Snapped grid-cell latitude returned by Open-Meteo.
    - `longitude` number, required — Snapped grid-cell longitude returned by Open-Meteo.
    - `elevation_m` number, nullable — Elevation of the grid cell above sea level (m).
    - `timezone` string, nullable — Timezone of the `date` field (UTC).
    - `models_requested` string[], required — List of CMIP6 model IDs requested by the client.
    - `variables_requested` string[], required — List of daily variable IDs requested by the client.
    - `start_date` string, required — Requested start date (YYYY-MM-DD, >= 1950-01-01).
    - `end_date` string, required — Requested end date (YYYY-MM-DD, <= 2050-12-31).
    - `units` object, required — Unit mapping for every returned variable.
    - `data` OpenMeteoClimateProjectionRow[], required — Row-oriented list, one row per (date, model) with all requested variables.
      - `date` string, required — Observation date in ISO 8601 UTC (YYYY-MM-DDTHH:MM:SSZ).
      - `model` string, required — CMIP6 HighResMIP model identifier, e.g. `CMCC_CM2_VHR4`.
      - `temperature_2m_max` number, nullable — Daily maximum 2-metre air temperature (C).
      - `temperature_2m_min` number, nullable — Daily minimum 2-metre air temperature (C).
      - `temperature_2m_mean` number, nullable — Daily mean 2-metre air temperature (C).
      - `precipitation_sum` number, nullable — Daily total precipitation (mm).
      - `wind_speed_10m_max` number, nullable — Daily maximum 10-metre wind speed (km/h).
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header. JSON body with a stable `code` distinguishing `missing_api_key` (no header sent) from `invalid_api_key` (header sent, key not accepted); any other 401 source carries the generic `unauthorized` with its detail as `reason`. Plus `hint`. `plan` is always null on 401 - an unauthenticated request has no plan; quota exhaustion is 429, not 401.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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